rtc/m48t86: use rtc_valid_tm() to check returned tm

Use rtc_valid_tm() to check the returned struct rtc_time *tm, to avoid
returning a wrong tm value.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
index 7c045cffa9ff64ae9e2e1e2a7c9f0ce75b7b9c18..f981287d582b76a4a68a11246451e37b9a60c352 100644 (file)
--- a/drivers/rtc/rtc-m48t86.c
+++ b/drivers/rtc/rtc-m48t86.c
@@ -77,7 +77,7 @@ static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)
                if (ops->readbyte(M48T86_REG_HOUR) & 0x80)
                        tm->tm_hour += 12;
 
-       return 0;
+       return rtc_valid_tm(tm);
 }
 
 static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm)